So what are you supposed to do with the expended CO2 cartridges? Are they refillable?

One time use. When you screw it on the device a pin punctures the seal. When it’s depleted it’s just a piece of scrap metal so put it in recycling. There are refillable CO2 cartridges but they are much larger

I’m sure we can put together a crew to help you test it and make sure it is functioning properly.

JP, holding just 64oz's (just 4 pints of beer) do you find yourself having to refill very often? I like the idea but 64 oz seems like it would leave me wanting. Plus hard to share with buddies as you'd quickly run out.

We've had a craft beer explosion in SW Ohio. I love craft beer, but sometimes I just want half a beer. Especially when it's a heavy stout or porter or an IPA with an ABV north of 7%. Also, regular growlers let the beer go flat in a flash so you have to drink 'em fast. This thing lets me drink the really good stuff over a week or so.

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"I will not eat green eggs and ham. I will not eat them. Sam, I am."